Greetings -
I'm running LilyPond 2.10.0.1, according to the Properties of
lilypond.exe, under Windows XP Pro V2002, SP2.
When I upgraded from 2.8.4.1, and ran convert.ly on my files, I got an
error on the following:
Begin snippet
%\version "2.8.4.1"
\version "2.10.0"
\include "english.ly"
Are you sure that the example worked in version 2.8?
I tried to process the code you sent with 2.8 and got an error message saying
ERROR: Unbound variable: trillflat
so I guess that it's only the error message that has changed.
Another option is that you had a line with something like
trillflat